一.动词的过去式的构成规则有:
A规则动词
②以e结尾的动词直接加d: 如lived , danced , used
B不规则动词
sing-sang,eat-ate,see-saw,have-had,do-did,go-went,take-took
二.动词的ing形式的构成规则:
①一般的直接在后面加.上ing ,如doing , going , working , singing , eating
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一.动词的过去式的构成规则有:
A规则动词
②以e结尾的动词直接加d: 如lived , danced , used
B不规则动词
sing-sang,eat-ate,see-saw,have-had,do-did,go-went,take-took
二.动词的ing形式的构成规则:
①一般的直接在后面加.上ing ,如doing , going , working , singing , eating